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Restructuring and Other Items, net (Tables) | 12 Months Ended
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Dec. 31, 2018
Restructuring and Other Items, net [Abstract] |
Schedule of restructuring charges | The following table outlines the amount of restructuring charges recorded within the Consolidated Statements of Income, and the segments they relate to:
Restructuring and Other Items, net |  | Year Ended December 31, |
(millions of dollars) |  | 2018 |  |  | 2017 |  |  | 2016 |
Impairment of assets |  |  |  |  |  |  |  |  |
Specialty Minerals |  | $ | 0.7 |  |  | $ | 5.3 |  |  | $ | — |
Energy Services |  |  | — |  |  |  | — |  |  |  | 18.5 |
Corporate |  |  | — |  |  |  | — |  |  |  | — |
Total impairment of assets charges |  | $ | 0.7 |  |  | $ | 5.3 |  |  | $ | 18.5 |
Severance and other employee costs |  |  |  |  |  |  |  |  |  |  |  |
Specialty Minerals |  | $ | — |  |  | $ | 5.0 |  |  | $ | — |
Energy Services |  |  | 1.8 |  |  |  | 1.7 |  |  |  | 12.7 |
Corporate |  |  | — |  |  |  | 4.1 |  |  |  | — |
Total severance and other employee costs |  | $ | 1.8 |  |  | $ | 10.8 |  |  | $ | 12.7 |
Other |  |  |  |  |  |  |  |  |  |  |  |
Refractories |  | $ | — |  |  | $ | — |  |  | $ | (2.0 | )
Energy Services |  |  | — |  |  |  | (1.1 | ) |  |  | (0.9 | )
Total restructuring and other items, net |  | $ | 2.5 |  |  | $ | 15.0 |  |  | $ | 28.3 |
Reconciliation of Restructuring Liability | The following table is a reconciliation of our restructuring liability balance:
(millions of dollars) |  |  |
Restructuring liability, December 31, 2017 |  | $ | 8.1 |
Additional provisions |  |  | 1.7 |
Cash payments |  |  | (6.6 | )
Other |  |  | (0.7 | )
Restructuring liability, December 31, 2018 |  | $ | 2.5 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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